Bench-screw



H. REISIGEH.

BENCH SCREW.

APPLICATION FILED Aue.14. 1919.

1,345,403. P nt d July 6, 1920.

Irry.

UNITED STATES HUGO REISIGER, OF ROTTERDAM, NETHERLANDS.

BENCH-SCREW.

Application filed August 14, 1919.

I?) all whom it may concern:

Be it known that I, HUGO Rnrsrenn, a

subject of the Kingdom of Netherlands, residing at Rotterdam,Netherlands, have invented certain Bench-Screws, of which the followingis a specification.

This invention relates to abench-screw or vise, and more particularly toimproved means by which the movable jaw can be quickly brought intooperative relation with the fixed jaw and locked against retractivomovement and by means of which the movable jaw is automatically releasedwhen the work is disengaged, one of the objects of the invention beingto provide a pair of clutches pivotallymounted on one of the jaws and la depending member carried by the other jaw and adapted to be engaged bysaid clutches in such a manner that the movable jaw is not onlyprevented from moving backward but is forced into closer contact withthe fixed jaw or with the work between the jaws, the organization beingsuch that the vise is capable of accommodating work of considerablelength.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention consists in the novel features ofconstruction and combination of parts which will be more fully describedhereinafter and particularly pointed out in the claims.

In the drawings accompanying and forming part of this specificationFigure 1 is a perspective view illustrating a vise constructed inaccordance with the present invention and having a piece of work grippedbetween its jaws;

Fig. 2 is a plan view showing the mechanism for holding the jaws in awork-engaging relation;

Fig. 3 is a sectional view of the fixed aw and the operating partscarried thereby, taken approximately on the line AB of Fig. 2; and

Fig. 4 is an end elevation of the vise.

Similar characters of reference designate the same parts in thedifferent figures of the drawings.

The vise, in the preferred form herein illustrated, comprises a fixedjaw 1 provided with a lower bed or plate having means, such asperforated ears 1 for securing it to a bench or other suitable support,and a movable jaw 2 provided with an extension or bed 2*, which beds areslidable one Specification of Letters Patent.

Pz mtented July Serial No. 317,574.

against the other. In the lower bed or extension of the jaw l are formeda pair of longitudinally extending recesses or grooves, in which arelocated for sliding movement a pair of rods 3, each of which is providedat one end thereof with an open-ended recess that is adapted to straddlea cross member or trestle 4 that is slidable relatively to the extensionor bed of thefixed jaw 1.

' The opposite ends of the rod 3 are in conta ctwith a member hereinshown as a nut 5, having a threaded opening therethrough adapted toreceive a screw 6, which rotates in bearings in the walls of the jaw 1,one end of the screw passing to the exterior of the jaw 1 and providedwith a head 7 having an opening therethrough' adapted to re ceive ahandle or lever for rotating the screw. The opposite end ofthe screw isswiveled in the end wall 8 of the extension or bed of the jaw 1. It willthus be seen that by rotating the screw 6 the nut 5 may be moved forwardor backward.

As herein shown, the cross member or trestle 4c is of approximatelyU-shape formation, having right-angular portions at its ends, eachprovided with an opening through which passes a bolt 10. A pair ofclutches 11 are mounted on the extension or bed of the jaw 1 by means ofa pivot 12, which passes up through an opening in the bed. The clutches11 are provided each with an elongated slot 9 adapted to receive thebolt 10 which passes through the angular extension of the cross member 4for permitting adjustment of the clutches as the cross member slides onthe lower bed, the bolts 10 being retained in position by means ofwashers and nuts, as shown in Fig. 4;. The clutches 11 are provided atthe ends opposite their pivotal connection with the cross member, eachwith a cam formed head 13, the end of which is somewhat rounded orcurved, as shown clearly in Fig. 2. The extension or bed of the movablejaw 2 is provided at its'under face with a longitudinally dependingportion 14 which is adapted to slide between the heads 13 of theclutches 11. As clearly shown in Fig. 1, the-under surface of the bed ofthe movable jaw 2 is approximately T-shaped in cross-section, and thelower bed is-provided with a pair of longitudinally extending upstandingportions 15 shaped to conform to the depending side portions of the T soas to form a guide therefore and permit the said bed of the jaw 2 to beslid on the bed of the jaw 1, while the stem of the T forms thedepending portion 14: adapted to slide between the clutches. Thisdepending portion 14, as indicated in Fig. 2, extends only the length ofthe bed of the jaw 2, and does not continue into the space below theoverhanging portion of the jaw, so that the jaws when brought togetherto clamp a piece of work between them have :a clear space for permittinglong pieces of work to be held between the jaws, as illustrated in Fig.1.

It is thought that the operation of the device will be clear from theforegoing description. When out of operation, the heads 13 of theclutches 11 are normally sufficiently far apart to permit the dependingportion let of the upper bed to slide freely between them. Whenitisdesired to clamp a piece of work between the jaws, the work is placed inposition and the jaw 2 slid onthe bed of the jaw 1 untilthe work isengaged between the jaws. Thereupon the operator rotates the screw 6 bymeans of the handle 7 in the proper direction, as, for instance, to theleft, to cause the nuts 5 to exert pressure on the end of the rod 3,which in turn cause the cross member 4 to slide and thereby swing theclutches 11 on their pivots 12 and cause the cam heads '13 to firmlyengage the de pending member 14: of the slidable jaw. It will thus beseen that, because of the pivotal action of the clutches and their camformation, that upon turning the screw 6' somewhat further the heads 13of the clutches will forcethe jaw 2 into firm engagement with the work.

From the foregoing it will be seen that l. have provided an improvedconstructimi of vise by means of which the jaws can be brought graduallyinto firm engagement with the work, so as to avoid injury thereto, andat the same time it is impossible for the work to slide away while beingoperated on.

This construction has the advantage that, while holding the piece ofwork with one hand, the operator can slide the movable jaw easilyagainst it with the other hand and thereafter, by a slight rotation ofthe screw 6, cause the clutches to firmly engage the depending member14; and not only prethat I do not thereby limit my invention to theprecise features of construction shown,

as I I am aware that many mechanical changes and modifications may bemade therein without departing from the spirit and scope of theinvention asset forth in the appended claims.

Having thus described my invention, what i I claim is: I

' 1. A vise, comprising a fixed jaw' and a movable jaw, a pair ofpivotally mounted clutches carried by one of said jaws, a dependingmember carr'ied by the other o said jaws in position to be gripped bysaid clutches when the jaws are brought into work-engaging relation, andmeans for operating said. clutches, and including a cross memberslidable with relation to the jaws and pivotally connected to saidclutches, and a pair of rods slid-able relatively to the jaws and inoperative engagement with said cross member.

2. A vise, eomprising a pair of jaws, one fixed and the other slidablerelatively thereto, a cross member slidably carried by said fixed jaw, apair of rods slida'bly carried by fixed jaw in operative engagement withsai member, a pair of clutches pivotall carried by said fixed jaw andpivotaily connected to said cross member, a depending member carried bysaid slidable jaw and adapted to slide between said clutches, and

in presence of two witnesses.

nueonmsienn.

Witnesses F. CRoNE, O. C. Bun on.

